v0.3.3 - Added LLM config saving + encrypted api's and prompt instructions

I've added in functionality to save the API key and Model to the config.json. The API key is encrypted on storage and is decrypted on displaying to the user within the settings page, as well as encrypting the prompt instructions as they may include sensitive information. The check for update function for each field has been updated to on large function, over having multiple individual functions to help clean up the code a bit.

I've also added 5 LLM configurations, these being for Gemini, Mistral, Claude, Deepseek, and openAI. I plan in implementing a system where the user can choose what LLM they wish to use for every phone number, and possibly have custom arguments for each number to use specific models from different providers